Abstract:

Caffeine consumption is widely prevalent among students and young adults, particularly in contexts requiring sustained attention, such as academic study and work. While caffeine enhances alertness, its potential effects on stress levels and sleep quality remain a growing concern[1,2]. This cross-sectional descriptive study aimed to examine the relationship between caffeine consumption, stress levels, and sleep quality among 68 participants, including secondary school students, university students, and working-age individuals. Data were collected on demographic characteristics, caffeine consumption patterns, stress levels (0–10 scale), sleep quality (1–4 scale), and self-reported symptoms, and were analyzed using descriptive statistics, correlation analysis, and simple linear regression. The results showed that upper secondary female students exhibited the highest mean stress level (7.02) along with relatively poor sleep quality. A weak negative correlation was observed between stress and sleep quality (r ≈ -0.27), and regression analysis indicated that increased stress was associated with decreased sleep quality (β ≈ -0.23). Common symptoms following caffeine consumption included palpitations, insomnia, and abdominal discomfort, while coffee consumption was associated with poorer sleep quality compared to tea. These findings suggest that caffeine consumption and stress may jointly contribute to impaired sleep quality, potentially forming a self-reinforcing cycle, highlighting the need for targeted interventions to promote appropriate caffeine use and improve sleep hygiene, particularly among high-risk student populations.